Oil well line control head



Nam 22, 193%. WALLER 2,137,599

OIL WELL LINE CONTROL HEAD Filed July 25, 1.938 2 Sheets-Sheet l In ventor A iiomeys Nov. 22, 1938.

H. WALLER 2,137,599 OIL WELL LINE CONTROL HEAD Filed July 25, 1938 2 Sheets-Sheet 22 In uenior Patented Nov. 22, 1938 UNITED STATES FATENT OFFICE 1 Claim.

This invention appertains to new and useful improvements in oil well control heads.

The principal object of the present invention is to provide an oil well control head especially adapted for pressure control of an oil well in the event of'fire.

Another important object of the invention is to provide a control head of the character stated wherein the parts will be positive acting and substantially fool-proof.

These and various other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational View.

Figure 2 represents a top plan view.

Figure 3 is a front elevational view.

Figure 4 is a section on the line il of Figure 1.

Referring to the drawings, wherein like numerals designate like parts, it can be seen that numeral 5 is the hollow block from which extends downwardly the barrel 6 for receiving the usual oil well pipe (not shown). The barrel 5 is split and provided with the side flanges l which can be bolted together as at 8 to clamp the barrel 6 around the well pipe.

The barrel 6 opens-into the block 5. Adjacent the lower portion of the block 5 is the pressure release port 9 behind which is the swingable closure plate It, the laterally disposed arm H which is pivotally mounted as at ii. A spring l3 serves to normally hold the closure plate iii in closed position over the port 9.

An arm [4 extends laterally from the lower portion of the block 5 and rockably supports the lever IS, the lever being pivotally connected to the arm M as at l6.

The numeral ll denotes the slide valve plate which is slidable through the guide l8 and through a slot in one side of the block 5. The slide plate I1 is slidable into the block 5 so as to close oif the passageway through the block and be seated in the guideway I9 thereof.

The outer end of the plate H is bifurcated as at 20 to receive the upper end of the lever which has the longitudinally extending slot 2i therein for receiving the pin 22, this pin extending entirely through the bifurcated end of the plate H and having eye members 23 on the ends thereof into which the corresponding ends of the expansion spring 24 are engaged. The

outer ends of the expansion spring 24 are hooked into the eye members 25 which extend laterally from the upper portion of the block 5.

An arm 26 extends laterally from the barrel 6 and supports the trigger head 21 at its outer end, rockable by the pin 28. This trigger head 2'1 is provided with the arm 29 having an opening 30 in its lower end to accommodate a pull cord or cable (not shown) which can be disposed downwardly and over the pulley 3|.

The lower end of the lever G5 has the ring 32, while a separate ring or loop 33 is carried by the lower portion of the lever I5 just above the ring 32. The ring 33 has a straight portion a which is engaged below the slip head 21.

Obviously when the arm 29 is pulled so as to rotate the slip 2i, the ring 33 is released so that the springs 2d will rock the lever l5 and allow the plate 21 to move inwardly, shutting off the passageway through the block 5 and as the plate H moves inwardly, it rides over the bevelled end of the arm I! of the closure plate ill, opening the port 9 so as to take care of the releasement of high pressure.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is-- A control device for an oil well comprising a casing, having its top open and having a port in one side thereof, a barrel depending from the easing, means for attaching the barrel to the upper end of a well, a slide valve, guiding means for the same, spring means for normally holding the slide valve in position closing the upper end of the casing, a bracket extending from the casing, a lever pivoted intermediate its ends to said bracket, means for connecting the upper end of the lever to the valve, latch means for holding the lever in position with the valve in open position, a valve for closing the port, a spring for normally holding the last-mentioned valve in position closing the port and means for moving said last-mentioned valve to open position as the slide valve moves to closing position.

HUGH WALLER. 

